The user can define an upper and lower threshold SMS alarm values for each sensor. If a measured value exceeds (or goes below) the establish threshold, the iMetos3.3 will send the SMS with a warning text (name of sensor, actual value, threshold value) to up to 30 different mobile phone numbers.
Alarm thresholds are checked every 5 minutes within each measurement. When the iMetos receives the sent acknowledgment from the mobile network the iMetos3.3 will disable SMS sending for 4 hours.
But if a measured value drops below the threshold in 3 consequent measurement cycles, the iMetos will again enable the sending of SMS and send the corresponding alarm.
Temperature sensor threshold for SMS warning is set to 30°C
Measurement 1: 9:00 value = 28°C
Measurement 2: 9:05 value = 30°C -> a warning SMS is send
Measurement 3: 9:10 value = 31°C -> within a 4hour block interval -> warning SMS is not send
Measurement 4: 9:15 value = 28°C
Measurement 5: 9:20 value = 29.5°C
Measurement 6: 9.25 value = 29°C -> the blocking interval is cleared
Measurement 7: 9:30 value = 31°C -> warning SMS is send and block interval is started again
After each SMS is sent the iMETOS 3.3 will maintain the modem “on” and establish a communication with FieldClimate.com to upload the complete set of stored data since the previous communication and to receive new settings (if there are any) from the user.